US5468150A - Means for fastening artificial teeth - Google Patents

Means for fastening artificial teeth Download PDF

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Publication number
US5468150A
US5468150A US08/295,301 US29530194A US5468150A US 5468150 A US5468150 A US 5468150A US 29530194 A US29530194 A US 29530194A US 5468150 A US5468150 A US 5468150A
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bore
secondary portion
shank
implant
longitudinal
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US08/295,301
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Dierk Brammann
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    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61CDENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C8/00Means to be fixed to the jaw-bone for consolidating natural teeth or for fixing dental prostheses thereon; Dental implants; Implanting tools
    • A61C8/0048Connecting the upper structure to the implant, e.g. bridging bars
    • A61C8/005Connecting devices for joining an upper structure with an implant member, e.g. spacers
    • A61C8/0065Connecting devices for joining an upper structure with an implant member, e.g. spacers with expandable or compressible means
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61CDENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C8/00Means to be fixed to the jaw-bone for consolidating natural teeth or for fixing dental prostheses thereon; Dental implants; Implanting tools
    • A61C8/0048Connecting the upper structure to the implant, e.g. bridging bars
    • A61C8/005Connecting devices for joining an upper structure with an implant member, e.g. spacers
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61CDENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C8/00Means to be fixed to the jaw-bone for consolidating natural teeth or for fixing dental prostheses thereon; Dental implants; Implanting tools
    • A61C8/0048Connecting the upper structure to the implant, e.g. bridging bars
    • A61C8/005Connecting devices for joining an upper structure with an implant member, e.g. spacers
    • A61C8/0069Connecting devices for joining an upper structure with an implant member, e.g. spacers tapered or conical connection
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61CDENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C8/00Means to be fixed to the jaw-bone for consolidating natural teeth or for fixing dental prostheses thereon; Dental implants; Implanting tools
    • A61C8/0086Means to be fixed to the jaw-bone for consolidating natural teeth or for fixing dental prostheses thereon; Dental implants; Implanting tools with shock absorbing means
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61KPREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K6/00Preparations for dentistry
    • A61K6/80Preparations for artificial teeth, for filling teeth or for capping teeth
    • A61K6/884Preparations for artificial teeth, for filling teeth or for capping teeth comprising natural or synthetic resins
    • A61K6/887Compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61CDENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C8/00Means to be fixed to the jaw-bone for consolidating natural teeth or for fixing dental prostheses thereon; Dental implants; Implanting tools
    • A61C8/0048Connecting the upper structure to the implant, e.g. bridging bars
    • A61C8/005Connecting devices for joining an upper structure with an implant member, e.g. spacers
    • A61C8/0054Connecting devices for joining an upper structure with an implant member, e.g. spacers having a cylindrical implant connecting part
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61CDENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C8/00Means to be fixed to the jaw-bone for consolidating natural teeth or for fixing dental prostheses thereon; Dental implants; Implanting tools
    • A61C8/0048Connecting the upper structure to the implant, e.g. bridging bars
    • A61C8/005Connecting devices for joining an upper structure with an implant member, e.g. spacers
    • A61C8/0062Catch or snap type connection

Definitions

  • the invention relates to a means for fastening artificial teeth in the human jaw.
  • an implant consisting of a material which harmonizes with the human body, such as titanium, is inserted into the jaw and is left there for some time to fasten.
  • the implant is formed like a shell and at least distally comprises an inner bore for receiving a secondary portion which then serves as a support for the denture. It has become known to screw the secondary portion on the implant (primary portion) and to screw the denture on the secondary portion then.
  • an implant has become known, the implant body of which comprises a distal annular shoulder and a blind bore arranged coaxially with the annular shoulder and moving into engagement with a shank of said secondary portion.
  • the top of the secondary portion is supported by the annular shoulder via a collar and a distance ring.
  • the distance ring is defined as an elastically deformable annular lip.
  • a blind bore results in a cavity provided deeply inside of the implant body.
  • the pin carries a grip head engaging a cavity and comprising segments being elastically deformable against each other, as a result of which the head can be elastically compressed into at least the blind bore exit section and expands within the cavity so as to cause the grip head segments to engage the wall of the cavity in the upper and lower part.
  • the secondary portion is supported in the implant partially axially and movably to the side.
  • the object of the invention is to provide a means for fastening artificial teeth in the human jaw so as to allow a precise shaping and fitting of these artificial teeth. Furthermore, a permanent position of the artificial teeth should be guaranteed.
  • the means for fastening artificial teeth comprises the following.
  • An implant primary portion is formed with a longitudinal blind bore closed at a distal end thereof.
  • the implant primary portion is adapted and designed for insertion into the jaw.
  • a shell formed with a longitudinal through bore, is adapted and designed for coaxial retention within the blind bore, so as to extend to less than the closed distal end of the blind bore.
  • An implant secondary portion having a longitudinal axis with a distally extending shank terminates in a distal enlargement and had a longitudinal through bore.
  • the shank has a distal slot parallel to the longitudinal axis.
  • the secondary portion also has a proximally enlarged head of larger cross-section than the blind bore.
  • the shank is sized and adapted for being fully coaxially retained within the longitudinal through bore of the shell, so that the distal enlargement extends past a distal end of the shell.
  • a top is adapted and arranged to be matingly positioned on the enlarged head.
  • the top is provided with a longitudinal through bore in coaxial alignment with the through bore of the secondary portion.
  • An elongated mandrel is sized and adapted to be longitudinally retained within the top through bore and within the through bole of the secondary portion for retaining the top in position against the enlarged head and for urging sections of the slotted shank radially outward.
  • the secondary portion is supported by the proximal end of the implant via a radial shoulder, thus providing a permanent position of the artificial teeth in axial direction.
  • the counteracting forces in transverse direction and the direction of extraction are absorbed by the shank arranged within the shell of the implant.
  • the shank in the end portion is radially expanded so as to cooperate with the rear cut and be safely kept in the shell of the implant.
  • an insurmountable resistance is put up to an extraction force.
  • the rear cut by means of a cone-shaped area in the bore which is formed by a cone-shaped area at the outside of the expandable segments of the shank.
  • the spreadable portion of the shank comprises an annularly surrounding outer surface which cooperates with an annularly surrounding opposite surface in the bore of the implant so as to cause the secondary portion to be axially drawn into the centre of the bore in case of a radial spread of the slotted portion of the secondary, portion.
  • the secondary portion is axially pretensioned in the direction of the shell of the implant so that the secondary portion with its shoulder can tightly engage the shell of the implant. In this way, a defined gap between the secondary portion and the implant can be provided.
  • the slotted or, respectively, spreadable section of the shank is spherical and with this spherical section engages a convex swelling in the bore of the implant.
  • a continued spreading with the aid of the mandrel causes the shank to be drawn into the centre of the implant still further and thus forces the radial shoulder of the secondary portion against the outer end of the implant.
  • the shank can be defined so as to fit into the blind bore of the implant approximately matingly with a relatively big portion for absorbing transverse forces.
  • the area of engagement of the shank is in close proximity of the end of the blind bore so as to form a big lever arm for absorbing transverse forces.
  • the secondary portion can be arranged in the implant so as to be secured against rotation.
  • a conical cap is provided which is matingly put on the free end of the secondary portion.
  • the free end comprises a cone which fittingly receives the conical cap.
  • FIG. 1 shows a sectional view of a first embodiment of the means according to the invention
  • FIG. 2 shows a sectional view of a second embodiment of the means according to the invention.
  • FIG. 1 shows an implant 10 of a suitable material harmonizing with the human body, for instance titanium, which implant is formed like a shell and has a proximally closed end 12.
  • the implant 10 comprises a cylindrical blind bore 14 and has been marginally resp. orally provided with a conical face 16.
  • a cylindrical shell 18 has been inserted into the blind bore 14 and fastened thereto which cylindrical shell 18 may be composed of the same material as said implant 10 or of a suitable synthetic material, such as polymethylacrylate or a HPDE (high-density polyethylene).
  • the shell 18 has been provided with a cone-shaped face 20 which is in alignment with the face 16.
  • the shell 18 is shorter than the blind hole 14 so that a rear cut 22 results which is conically defined as well.
  • a cone-shaped secondary portion 24 comprises a shank 26 which, for instance, consists of four parallel legs 28 which are separated from each other by elongated slots 30 parallel to the axis.
  • Each leg 28 at the lower end comprises a swelling 32 with an upper inclined surface 34 which cooperates with the correspondingly defined opposite surface 22 of the shell 18.
  • the shank 26 extends into the shell 18, with the thickened portions 32 extending within the area below the ends of shell 18. Besides, the shank 26 pushes through a proximally cone-shaped ring 36 of a suitable material harmonizing with the human body which material engages the annular-shaped lower side of the secondary portion 24 upwards. It may also be taken into consideration to form the ring 36 of a non-rigid material.
  • An elongated mandrel 40 extends through the through bore 38 of the secondary portion 24.
  • the mandrel comprises a thread portion and cooperates with a thread portion 42 of the bore 38.
  • a top 43 including a through bore 44 through which the mandrel 40 extends is fittingly arranged on the secondary portion 24, with said mandrel 40, however, being clearly projecting from the secondary portion 24.
  • the mandrel 40 at its open end comprises a screw driver slot 46 so that it can be dislocated by means of a suitable tool.
  • the secondary portion 24 To fix the implant in the jaw the secondary portion 24 together with the ring 36 put thereon, first of all, is inserted into the implant 10 so as to cause the swellings 32 to lock behind the face 22 of the shell 18. Thereafter, the top 43 is put on the secondary portion 24 and, then, the mandrel 40 is led through said top, the secondary portion 24, the ring 36 and the shell 18 and is screwed. As a result of the screw connection, a tensile strength can be realized between the secondary portion 24 and the implant 10 for safely fastening the secondary portion 24 and the implant 10, with the ring 36 being compressed. Thus, the denture 43 is tightly secured to the implant 10.
  • a shell-shaped implant 100 is shown which is closed at the proximal end 102. It comprises a blind bore 104 close to the upper end 106 which is formed as a plane annular area perpendicular to the axis of the implant 100.
  • annular groove 108 is formed which in its cross-section is circular.
  • a thread 110 is formed which comprises a threaded groove 112 being rounded in its cross-section as well as a rounded thread 114.
  • the flanks 116 pointing upward are steeper than the opposite flanks 118 so that implant shell 100 is screwed into a preformed bore in the jaw in a relatively simple way but high extraction forces do result.
  • the bore has a diameter which is identical to the core diameter of the thread 110.
  • a secondary portion 120 comprises a shank 122 inserted into the blind bore 104 as well as a construction 124 outside the implant 100.
  • the shank 122 with a relatively big portion is matingly accommodated by bore 104 while a portion 126 of an enlarged diameter is received by an enlarged bore portion 128.
  • the portion 126 in its cross-section is of a hexagonal shape. Accordingly, the recess 128 is hexagonal as well.
  • the shank 122 is secured against rotation.
  • the shank 122 comprises a circumferentially arranged groove 130 which is circular in its cross-section and forms a contraction.
  • a spherical portion 132 is provided which by means of slots 134 parallel to the axis is subdivided into four segments offset by 90°.
  • the secondary portion 120 comprises an axial through bore which in the upper area includes an inside thread.
  • a mandrel 136 which in the lower area is cone-shaped comprises a head 138 including an external thread which can be screwed into said inside thread of the through bore.
  • the head 138 comprises a screw driver slot 140 so as to screw the mandrel 136 into the secondary portion 120.
  • the blind bore 104 has a convex, circumferentially arranged swelling 142 pointing radially inward and forming a rear cut for the spherical section 132 of the shank 122.
  • the secondary portion 120 comprises an annular flange 144 pointing radially outward and forming an annular area or shoulder 146 pointing downward.
  • On the opposite side said flange comprises a cone-shaped area 149.
  • the mandrel 138 spreads the segments of the spherical section 132 radially outward while being screwed in which causes the shank 122: to be axially held in the bore 104.
  • the segments of the spherical section 132 and of the swelling 142 are defined so as to generate an axial force towards the end of the blind bore 104 at the moment the segments spread apart which causes the areas 106, 146 to be pressed against each other so as to form a defined gap. It should be remarked incidentally that the mandrel 136 needs not to be cone-shaped at all.
  • a cap 148 being cone-shaped inside and outside is put on the conical construction 124.
  • the inner cone of the cap 148 mates with the outer cone of the construction 124.
  • the lower end of the cap 148 as shown in FIG. 2 at 150, is cone-shaped, with the conical area being matingly cooperating with the conical area 148 of the annular flange 144.
  • the construction 124 and the cap 148 in their cross-section are circular, in which case, however, as indicated at 152, at least one, preferably four positions offset by 90°, comprise flattenings at the outside of the construction 124 and the inside of the cap 148 for securing the cap 148 to the construction 124 so as to withstand any rotation.
  • the cap 148 extends upward beyond the construction 124 and is secured to the secondary portion through the head 154 of a screw 156 which is screwed into the thread bore of the secondary portion 120.
  • the screw 156 comprises a slot 158 for a screw driver.
  • the length of the shank of the screw 156 is so dimensioned that it in any case is spaced apart from the head 138 of the mandrel 136 as soon as said mandrel has arrived at its final position.
  • the implant 100 consists of a suitable metal which harmonizes with the human body.
  • the other parts consist of a suitable metal or synthetic material as it is also used for the means according to FIG. 1.

Abstract

Means for fastening artificial teeth in the human jaw comprising an implant which is to be inserted into the jaw and is formed as a closed shell, a secondary portion including a connecting shank and being connectable to said implant, which secondary portion serves as a support for the artificial teeth, and a fastening element for fastening the artificial teeth to said secondary portion, with said connecting shank being held in the blind bore of said implant and at the proximal end comprising at least one slot parallel to the axis for providing a snap and spread connection with a rear cut in said blind bore, with said shank comprising a radially spreadable section which with the aid of a mandrel inserted into said secondary portion via an axial bore can be spread or, respectively, radially held in said implant, and said secondary portion comprising a radial shoulder which is supported by the distal end of said implant as soon as said spreadable section engages said rear cut.

Description

FIELD OF THE INVENTION
The invention relates to a means for fastening artificial teeth in the human jaw.
BACKGROUND OF THE INVENTION
It has become known to fix sets of dentures, such as crowns, bridges or suchlike, in the jaw with the aid of so-called implants. An implant consisting of a material which harmonizes with the human body, such as titanium, is inserted into the jaw and is left there for some time to fasten. Usually, the implant is formed like a shell and at least distally comprises an inner bore for receiving a secondary portion which then serves as a support for the denture. It has become known to screw the secondary portion on the implant (primary portion) and to screw the denture on the secondary portion then.
From the German Offen. DE 33 00 764 an implant has become known, the implant body of which comprises a distal annular shoulder and a blind bore arranged coaxially with the annular shoulder and moving into engagement with a shank of said secondary portion. The top of the secondary portion is supported by the annular shoulder via a collar and a distance ring. The distance ring is defined as an elastically deformable annular lip. A blind bore results in a cavity provided deeply inside of the implant body. The pin carries a grip head engaging a cavity and comprising segments being elastically deformable against each other, as a result of which the head can be elastically compressed into at least the blind bore exit section and expands within the cavity so as to cause the grip head segments to engage the wall of the cavity in the upper and lower part. Thus, the secondary portion is supported in the implant partially axially and movably to the side.
SUMMARY OF THE INVENTION
The object of the invention is to provide a means for fastening artificial teeth in the human jaw so as to allow a precise shaping and fitting of these artificial teeth. Furthermore, a permanent position of the artificial teeth should be guaranteed.
Thus, the means for fastening artificial teeth comprises the following.
An implant primary portion is formed with a longitudinal blind bore closed at a distal end thereof. The implant primary portion is adapted and designed for insertion into the jaw.
A shell, formed with a longitudinal through bore, is adapted and designed for coaxial retention within the blind bore, so as to extend to less than the closed distal end of the blind bore.
An implant secondary portion having a longitudinal axis with a distally extending shank terminates in a distal enlargement and had a longitudinal through bore. The shank has a distal slot parallel to the longitudinal axis. The secondary portion also has a proximally enlarged head of larger cross-section than the blind bore. The shank is sized and adapted for being fully coaxially retained within the longitudinal through bore of the shell, so that the distal enlargement extends past a distal end of the shell.
A top is adapted and arranged to be matingly positioned on the enlarged head. The top is provided with a longitudinal through bore in coaxial alignment with the through bore of the secondary portion.
An elongated mandrel is sized and adapted to be longitudinally retained within the top through bore and within the through bole of the secondary portion for retaining the top in position against the enlarged head and for urging sections of the slotted shank radially outward.
According to the inventive means, the secondary portion is supported by the proximal end of the implant via a radial shoulder, thus providing a permanent position of the artificial teeth in axial direction. The counteracting forces in transverse direction and the direction of extraction are absorbed by the shank arranged within the shell of the implant. With the aid of the mandrel the shank in the end portion is radially expanded so as to cooperate with the rear cut and be safely kept in the shell of the implant. Thus, an insurmountable resistance is put up to an extraction force.
It is thinkable to form the rear cut by means of a cone-shaped area in the bore which is formed by a cone-shaped area at the outside of the expandable segments of the shank. According to an embodiment of the invention, however, this is to be preferred if the spreadable portion of the shank comprises an annularly surrounding outer surface which cooperates with an annularly surrounding opposite surface in the bore of the implant so as to cause the secondary portion to be axially drawn into the centre of the bore in case of a radial spread of the slotted portion of the secondary, portion. During insertion of the mandrel, for example by screwing it into the bore of the shank, the shank or, respectively, the secondary portion is axially pretensioned in the direction of the shell of the implant so that the secondary portion with its shoulder can tightly engage the shell of the implant. In this way, a defined gap between the secondary portion and the implant can be provided.
It is especially advantageous if the slotted or, respectively, spreadable section of the shank is spherical and with this spherical section engages a convex swelling in the bore of the implant. A continued spreading with the aid of the mandrel causes the shank to be drawn into the centre of the implant still further and thus forces the radial shoulder of the secondary portion against the outer end of the implant. The shank can be defined so as to fit into the blind bore of the implant approximately matingly with a relatively big portion for absorbing transverse forces. As a result of the described spherical shape of the free end of the shank, the area of engagement of the shank is in close proximity of the end of the blind bore so as to form a big lever arm for absorbing transverse forces.
In consequence of a corresponding shaping of the cross sections of the secondary portion or, respectively, the shank on the one hand and of a bore portion of the implant on the other hand, the secondary portion can be arranged in the implant so as to be secured against rotation.
It is known and usual to conically form the so-called top of the secondary portion, i.e. that section of the secondary portion which projects from the implant. According to and embodiment of the invention, a conical cap is provided which is matingly put on the free end of the secondary portion. Preferably, the free end comprises a cone which fittingly receives the conical cap. The use of a conical cap has the advantage that different caps with different outside dimensions and angles can be used which, depending on the application field, are put on the conical section of the secondary portion.
BRIEF DESCRIPTION OF THE DRAWINGS
The invention will be more detailedly explained hereinafter with the aid of drawings.
FIG. 1 shows a sectional view of a first embodiment of the means according to the invention;
FIG. 2 shows a sectional view of a second embodiment of the means according to the invention.
DETAILED DESCRIPTION OF THE INVENTION
FIG. 1 shows an implant 10 of a suitable material harmonizing with the human body, for instance titanium, which implant is formed like a shell and has a proximally closed end 12. The implant 10 comprises a cylindrical blind bore 14 and has been marginally resp. orally provided with a conical face 16. A cylindrical shell 18 has been inserted into the blind bore 14 and fastened thereto which cylindrical shell 18 may be composed of the same material as said implant 10 or of a suitable synthetic material, such as polymethylacrylate or a HPDE (high-density polyethylene). Also the shell 18 has been provided with a cone-shaped face 20 which is in alignment with the face 16. The shell 18 is shorter than the blind hole 14 so that a rear cut 22 results which is conically defined as well.
A cone-shaped secondary portion 24 comprises a shank 26 which, for instance, consists of four parallel legs 28 which are separated from each other by elongated slots 30 parallel to the axis. Each leg 28 at the lower end comprises a swelling 32 with an upper inclined surface 34 which cooperates with the correspondingly defined opposite surface 22 of the shell 18.
As can be seen, the shank 26 extends into the shell 18, with the thickened portions 32 extending within the area below the ends of shell 18. Besides, the shank 26 pushes through a proximally cone-shaped ring 36 of a suitable material harmonizing with the human body which material engages the annular-shaped lower side of the secondary portion 24 upwards. It may also be taken into consideration to form the ring 36 of a non-rigid material.
An elongated mandrel 40 extends through the through bore 38 of the secondary portion 24. The mandrel comprises a thread portion and cooperates with a thread portion 42 of the bore 38. A top 43 including a through bore 44 through which the mandrel 40 extends is fittingly arranged on the secondary portion 24, with said mandrel 40, however, being clearly projecting from the secondary portion 24. The mandrel 40 at its open end comprises a screw driver slot 46 so that it can be dislocated by means of a suitable tool.
To fix the implant in the jaw the secondary portion 24 together with the ring 36 put thereon, first of all, is inserted into the implant 10 so as to cause the swellings 32 to lock behind the face 22 of the shell 18. Thereafter, the top 43 is put on the secondary portion 24 and, then, the mandrel 40 is led through said top, the secondary portion 24, the ring 36 and the shell 18 and is screwed. As a result of the screw connection, a tensile strength can be realized between the secondary portion 24 and the implant 10 for safely fastening the secondary portion 24 and the implant 10, with the ring 36 being compressed. Thus, the denture 43 is tightly secured to the implant 10.
According to the embodiment of FIG. 2, in turn, a shell-shaped implant 100 is shown which is closed at the proximal end 102. It comprises a blind bore 104 close to the upper end 106 which is formed as a plane annular area perpendicular to the axis of the implant 100. At the outside of the implant 100 an annular groove 108 is formed which in its cross-section is circular. Below said annular groove 108 a thread 110 is formed which comprises a threaded groove 112 being rounded in its cross-section as well as a rounded thread 114. The flanks 116 pointing upward are steeper than the opposite flanks 118 so that implant shell 100 is screwed into a preformed bore in the jaw in a relatively simple way but high extraction forces do result. The bore has a diameter which is identical to the core diameter of the thread 110. Thus, the implant can be inserted into the jaw without having to use any cement.
A secondary portion 120 comprises a shank 122 inserted into the blind bore 104 as well as a construction 124 outside the implant 100. As appears from FIG. 2, the shank 122 with a relatively big portion is matingly accommodated by bore 104 while a portion 126 of an enlarged diameter is received by an enlarged bore portion 128. The portion 126 in its cross-section is of a hexagonal shape. Accordingly, the recess 128 is hexagonal as well. Thus, the shank 122 is secured against rotation.
In the lower and proximal section the shank 122 comprises a circumferentially arranged groove 130 which is circular in its cross-section and forms a contraction. Below said contraction 130 a spherical portion 132 is provided which by means of slots 134 parallel to the axis is subdivided into four segments offset by 90°.
The secondary portion 120 comprises an axial through bore which in the upper area includes an inside thread. A mandrel 136 which in the lower area is cone-shaped comprises a head 138 including an external thread which can be screwed into said inside thread of the through bore. The head 138 comprises a screw driver slot 140 so as to screw the mandrel 136 into the secondary portion 120.
The blind bore 104 has a convex, circumferentially arranged swelling 142 pointing radially inward and forming a rear cut for the spherical section 132 of the shank 122. The secondary portion 120 comprises an annular flange 144 pointing radially outward and forming an annular area or shoulder 146 pointing downward. On the opposite side said flange comprises a cone-shaped area 149. When inserting the shank 122 into the blind bore 104 the segments of the spherical section 132 can escape inward by passing the swelling 142. Thereafter, they spread apart anti engage the bottom side of the swelling 142 as soon as the shoulder 146 engages the face 106 of the implant 100. The mandrel 138 spreads the segments of the spherical section 132 radially outward while being screwed in which causes the shank 122: to be axially held in the bore 104. The segments of the spherical section 132 and of the swelling 142 are defined so as to generate an axial force towards the end of the blind bore 104 at the moment the segments spread apart which causes the areas 106, 146 to be pressed against each other so as to form a defined gap. It should be remarked incidentally that the mandrel 136 needs not to be cone-shaped at all.
A cap 148 being cone-shaped inside and outside is put on the conical construction 124. The inner cone of the cap 148 mates with the outer cone of the construction 124. The lower end of the cap 148, as shown in FIG. 2 at 150, is cone-shaped, with the conical area being matingly cooperating with the conical area 148 of the annular flange 144. The construction 124 and the cap 148 in their cross-section are circular, in which case, however, as indicated at 152, at least one, preferably four positions offset by 90°, comprise flattenings at the outside of the construction 124 and the inside of the cap 148 for securing the cap 148 to the construction 124 so as to withstand any rotation.
As can be seen from FIG. 2, the cap 148 extends upward beyond the construction 124 and is secured to the secondary portion through the head 154 of a screw 156 which is screwed into the thread bore of the secondary portion 120. The screw 156 comprises a slot 158 for a screw driver. The length of the shank of the screw 156 is so dimensioned that it in any case is spaced apart from the head 138 of the mandrel 136 as soon as said mandrel has arrived at its final position.
The implant 100 consists of a suitable metal which harmonizes with the human body. The other parts consist of a suitable metal or synthetic material as it is also used for the means according to FIG. 1.

Claims (17)

I claim:
1. An apparatus for fastening a dental implant in a jaw comprising:
an implant primary portion formed with a longitudinal blind bore closed at a distal end thereof, the implant primary portion adapted and designed for insertion into the jaw;
a shell formed with a longitudinal through bore adapted and designed for coaxial retention within the blind bore so as to extend to less than the closed distal end of the blind bore;
a secondary portion having a longitudinal axis with a distally extending shank terminating in a distal enlargement and a longitudinal through bore, the shank having a distal slot parallel to the longitudinal axis, the secondary portion also having a proximally enlarged head of larger cross-section than the blind bore, the shank sized and adapted for being fully coaxially retained within the longitudinal through bore of the shell, so that the distal enlargement extends past a distal end of the shell;
a top adapted and arranged to be matingly positioned on the enlarged head, the top provided with a longitudinal through bore in coaxial alignment with the through bore of the secondary portion; and
an elongated mandrel sized and adapted to be longitudinally retained within the top through bore and within the through bore of the secondary portion for retaining the top in position against the enlarged head and for urging sections of the slotted shank radially outward.
2. The apparatus according to claim 1, wherein the mandrel includes an external thread which cooperates with an internal thread in the secondary portion.
3. The apparatus according to claim 1, wherein the top is an artificial tooth and the mandrel thus secures the artificial tooth to the secondary portion.
4. The apparatus according to claim 1, wherein the shank is formed with a plurality of slots and the shank is circumferentially formed with flattened faces which mate with flattened surfaces within the bore of the secondary portion so as to be secured against rotation with respect thereto.
5. The apparatus according to claim 1, wherein a proximal end of the bore of the implant primary portion comprises an enlarged diameter recess for matingly receiving an enlarged section of the secondary portion and wherein a circumference of the recess and of the enlarged section is non-circular.
6. The apparatus according to claim 1, wherein the proximally enlarged head of the secondary portion has a cone-shaped outer surface for receiving the top with a mating conical inner surface and with a conical outer surface.
7. The apparatus according to claim 6, wherein the top is adapted and arranged to be secured on the proximally enlarged head so as to be secured against rotation.
8. The apparatus according to claim 1, wherein the top matingly covers a radial flange of the proximally enlarged head, such that the flange forms a radial shoulder for confronting a proximal end of the implant primary portion.
9. An apparatus for fastening a dental implant in a jaw comprising:
an implant primary portion formed with a longitudinal blind bore (104) closed at a distal end thereof, the bore provided with a radially constricting member at less than the distal end thereof, the implant primary portion adapted and designed for insertion into the jaw;
a secondary portion having a longitudinal axis with a distally extending shank terminating in a distal enlargement and a longitudinal through bore, the shank having a distal slot parallel to the longitudinal axis, the secondary portion also having a proximally enlarged head of larger cross-section than the blind bore, the shank sized and adapted for being fully coaxially retained within the blind bore, so that the distal enlargement extends past the radially constricting member;
a top adapted and arranged to be matingly positioned on the enlarged head, the top provided with a longitudinal through bore in coaxial alignment with the through bore of the secondary portion; and
an elongated mandrel sized and adapted to be longitudinally retained within the top through bore and within the through bore of the secondary portion for urging sections of the slotted shank radially outward.
10. The apparatus according to claim 9, wherein the radially constricting member within the bore is formed by a separate hollow shell coaxially retained within the blind bore.
11. The apparatus according to claim 9, wherein the top is an artificial tooth and the mandrel includes an external thread which cooperates with an internal thread in the secondary portion to secure the artificial tooth to the secondary portion.
12. The apparatus according to claim 9, wherein the mandrel is sized and adapted to be fully retained within the secondary portion leaving sufficient space for a screw adapted to be inserted into the top for fastening the top to the secondary portion.
13. The apparatus according to claim 9, wherein the shank is formed with a plurality of slots and wherein the distal enlargement of the shank slotted section is a spherical portion spaced apart from a distal end of the shank by a radial contraction and the radially constricting member is a convex swelling pointing radially inward which engages the radial contraction.
14. The apparatus according to claim 9, wherein the shank is circumferentially formed with flattened faces which mate with flattened surfaces within the bore of the secondary portion so as to be secured against rotation with respect thereto.
15. The apparatus according to claim 9, wherein the secondary section of the secondary portion arranged outside the implant has a cone-shaped outer surface and a cap with a conical inner and outer surface is provided, with the inner surface being matingly arranged on the secondary section.
16. The apparatus according to claim 9, wherein the cap is arranged on the secondary section of the secondary portion so as to be secured against rotation.
17. The apparatus according to claim 9, wherein the cap engages and covers a radial flange of the secondary portion, with the flange forming the radial shoulder.
US08/295,301 1993-10-21 1994-08-24 Means for fastening artificial teeth Expired - Fee Related US5468150A (en)

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DE9316043U DE9316043U1 (en) 1993-10-21 1993-10-21 Device for anchoring a denture in the human jaw

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US5766009A (en) * 1995-01-20 1998-06-16 Jeffcoat; Robert L. Elastically stabilized endosseous dental implant
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US6102702A (en) * 1998-12-28 2000-08-15 Aubrey Clinton Folsom, Jr. Quick tightening abutment lock
US6193516B1 (en) * 1999-06-18 2001-02-27 Sulzer Calcitek Inc. Dental implant having a force distribution shell to reduce stress shielding
US6206696B1 (en) 1999-12-10 2001-03-27 Sulzer Calcitek Inc. Driver tool for one step implant delivery system
US6247933B1 (en) 1999-12-10 2001-06-19 Sulzer Dental Inc. Dental implant delivery system
US6254387B1 (en) 1998-07-23 2001-07-03 Astra Aktiebolag Dental implant component
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US6416324B1 (en) 1999-12-10 2002-07-09 Sulzer Dental Inc. One step dental implant delivery system
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US20030054318A1 (en) * 2001-09-17 2003-03-20 Christopher Gervais Torque limiting implant drive system
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WO2005115267A1 (en) * 2004-05-31 2005-12-08 Casini, Vincenzo, Maria Mechanical connection device for use in implantology
US20060014120A1 (en) * 2004-07-16 2006-01-19 Sapian Schubert L Biofunctional dental implant
US20070141532A1 (en) * 2005-12-20 2007-06-21 Ford Christopher W Force distributing dental implant assembly
US20070141533A1 (en) * 2005-12-20 2007-06-21 Ford Christopher W Polymeric dental implant assembly
DE102007042921B3 (en) * 2007-09-08 2009-02-12 Bernd Rademacher Implant construction for accommodating dental prosthesis unit e.g. artificial teeth, has screw comprising thread end section that is locked at internal thread section in casing and at internal thread in rod through pressurization
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US20090286202A1 (en) * 2008-05-15 2009-11-19 Ford Christopher W Polymeric dental implant assembly
KR100963432B1 (en) * 2009-05-15 2010-06-17 노영우 Hole cap for implant super structure
US20100248184A1 (en) * 2004-05-19 2010-09-30 Straumann Holding Ag One-piece dental device and method to manufacture the same
US20110053114A1 (en) * 2009-09-02 2011-03-03 Arthro Co., Ltd. Human body implant structure, method of assembling the structure and method of disassembling the structure
US8454363B2 (en) 2008-11-06 2013-06-04 William B. Worthington Dental implant system
ITVI20130070A1 (en) * 2013-03-14 2013-06-13 Giandomenico Gonella DEVICE FOR DENTAL AND TECHNICAL USE.
US8636511B2 (en) 2002-11-13 2014-01-28 Biomet 3I, Llc Dental implant system
CN104168852A (en) * 2012-02-29 2014-11-26 马泰奥·安东尼尼 A medical device for dental prosthetic systems, a dental prosthetic system, use of the medical device and a forming method of prosthetic devices
US20150140508A1 (en) * 2013-11-18 2015-05-21 Adaptall Manufacturing Inc. Universal Retrofit Dental Abutment
US20160074141A1 (en) * 2014-09-12 2016-03-17 Italo Lozada Dental Prosthesis
US20160193017A1 (en) * 2015-01-05 2016-07-07 Kwang Seob Kim Implant unit
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US5766009A (en) * 1995-01-20 1998-06-16 Jeffcoat; Robert L. Elastically stabilized endosseous dental implant
US5733123A (en) * 1996-02-12 1998-03-31 Blacklock; Gordon D. Healing cap for implant anchor
US5752830A (en) * 1996-06-20 1998-05-19 Suarez; Omar F. Removable dental implant
US5865622A (en) * 1997-07-14 1999-02-02 Aleksey; Brodsky System for attaching a dental prosthesis to a dental implant
US5954505A (en) * 1998-03-05 1999-09-21 Ford; Christopher W. Force distributing dental implant
US6254387B1 (en) 1998-07-23 2001-07-03 Astra Aktiebolag Dental implant component
US6102702A (en) * 1998-12-28 2000-08-15 Aubrey Clinton Folsom, Jr. Quick tightening abutment lock
US20020086265A1 (en) * 1999-05-03 2002-07-04 Horst Langer Device for the destruction of a tooth
US6193516B1 (en) * 1999-06-18 2001-02-27 Sulzer Calcitek Inc. Dental implant having a force distribution shell to reduce stress shielding
US6206696B1 (en) 1999-12-10 2001-03-27 Sulzer Calcitek Inc. Driver tool for one step implant delivery system
US6416324B1 (en) 1999-12-10 2002-07-09 Sulzer Dental Inc. One step dental implant delivery system
US6247933B1 (en) 1999-12-10 2001-06-19 Sulzer Dental Inc. Dental implant delivery system
US7137816B2 (en) 2001-09-17 2006-11-21 Zimmer Dental Inc. Impression post and temporary abutment and method of making dental restoration
US20030054319A1 (en) * 2001-09-17 2003-03-20 Christopher Gervais Impression post and temporary abutment and method of making dental restoration
US20030054318A1 (en) * 2001-09-17 2003-03-20 Christopher Gervais Torque limiting implant drive system
US7160109B2 (en) 2001-09-17 2007-01-09 Sulzer Dental Inc. Torque limiting implant drive system
US20030129564A1 (en) * 2001-12-26 2003-07-10 Gyu Kang Implant for an artificial tooth having an impact decreasing device
US20040053195A1 (en) * 2002-09-17 2004-03-18 Blacklock Gordon D. Healing cap and gingival emergence profiler for dental implant anchor
US9549793B2 (en) 2002-11-13 2017-01-24 Biomet 3I, Llc Dental implant system
US9883927B2 (en) 2002-11-13 2018-02-06 Biomet 3I, Llc Dental implant system
US9931182B2 (en) 2002-11-13 2018-04-03 Biomet 3I, Llc Dental implant system
US8636511B2 (en) 2002-11-13 2014-01-28 Biomet 3I, Llc Dental implant system
FR2867379A1 (en) * 2004-03-11 2005-09-16 Alain Szczupak A device for use in dental reconstruction comprises a implant with a drilling and a post for a crown fitting into it with a gap which is filled with a flexible adhesive giving a degree of movement to the post and crown
WO2005087130A1 (en) * 2004-03-11 2005-09-22 Alain Szczupak Implant-supported dental reconstruction device which enables the micro-movement of the prosthetic element
US20100248184A1 (en) * 2004-05-19 2010-09-30 Straumann Holding Ag One-piece dental device and method to manufacture the same
WO2005115267A1 (en) * 2004-05-31 2005-12-08 Casini, Vincenzo, Maria Mechanical connection device for use in implantology
US7300282B2 (en) * 2004-07-16 2007-11-27 Sapian Schubert L Biofunctional dental implant
US20060014120A1 (en) * 2004-07-16 2006-01-19 Sapian Schubert L Biofunctional dental implant
US20070141533A1 (en) * 2005-12-20 2007-06-21 Ford Christopher W Polymeric dental implant assembly
US20070141532A1 (en) * 2005-12-20 2007-06-21 Ford Christopher W Force distributing dental implant assembly
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US20090208904A1 (en) * 2008-02-19 2009-08-20 Lans Maris J Dental implant
US20090286202A1 (en) * 2008-05-15 2009-11-19 Ford Christopher W Polymeric dental implant assembly
US8011926B2 (en) 2008-05-15 2011-09-06 Ford Christopher W Polymeric dental implant assembly
US8454363B2 (en) 2008-11-06 2013-06-04 William B. Worthington Dental implant system
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US20110053114A1 (en) * 2009-09-02 2011-03-03 Arthro Co., Ltd. Human body implant structure, method of assembling the structure and method of disassembling the structure
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US10952826B2 (en) 2011-06-28 2021-03-23 Biomet 3I, Llc System and method of dental implant and interface to abutment for restoration
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US9603680B2 (en) 2012-02-29 2017-03-28 Matteo Antonini Medical device for dental prosthetic systems, a dental prosthetic system, use of the medical device and a forming method of prosthetic devices
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US20160015485A1 (en) * 2013-03-14 2016-01-21 Giandomenico Gonella Device for use in dental technology
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US10595968B2 (en) 2013-10-08 2020-03-24 Horst Wismann Tooth implant
JP2016536027A (en) * 2013-10-08 2016-11-24 ウィスマン、ホルストWISMANN, Horst Dental implant
US20150140508A1 (en) * 2013-11-18 2015-05-21 Adaptall Manufacturing Inc. Universal Retrofit Dental Abutment
US20160074141A1 (en) * 2014-09-12 2016-03-17 Italo Lozada Dental Prosthesis
US10639132B2 (en) * 2014-09-12 2020-05-05 Italo Lozada Dental prosthesis
US20160193017A1 (en) * 2015-01-05 2016-07-07 Kwang Seob Kim Implant unit
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AU2016277870B2 (en) * 2015-06-19 2021-04-08 Nobel Biocare Services Ag Dental connection assembly and method for producing a dental prosthesis
US11246685B2 (en) * 2015-06-19 2022-02-15 Nobel Biocare Services Ag Dental connection assembly and method for producing a dental prosthesis
US11207157B2 (en) * 2015-10-27 2021-12-28 Kulzer Gmbh Scan abutment for a dental implant having reduction of the fit clearance

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DE9316043U1 (en) 1994-01-13

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